CN110366841A - Transmission device, transfer approach and conveyer system - Google Patents

Transmission device, transfer approach and conveyer system Download PDF

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Publication number
CN110366841A
CN110366841A CN201780087648.9A CN201780087648A CN110366841A CN 110366841 A CN110366841 A CN 110366841A CN 201780087648 A CN201780087648 A CN 201780087648A CN 110366841 A CN110366841 A CN 110366841A
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China
Prior art keywords
frame
class
transmission device
transmission
information
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CN201780087648.9A
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Chinese (zh)
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CN110366841B (en
Inventor
井上礼子
谷口幸子
坂上佑介
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Mitsubishi Corp
Mitsubishi Electric Corp
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Mitsubishi Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2803—Home automation networks
    • H04L12/2807—Exchanging configuration information on appliance services in a home automation network
    • H04L12/2812—Exchanging configuration information on appliance services in a home automation network describing content present in a home automation network, e.g. audio video content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/25—Routing or path finding in a switch fabric
    • H04L49/251—Cut-through or wormhole routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2483—Traffic characterised by specific attributes, e.g. priority or QoS involving identification of individual flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/20—Support for services
    • H04L49/205—Quality of Service based
    • H04L49/206—Real Time traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/25—Routing or path finding in a switch fabric
    • H04L49/252—Store and forward routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/30—Peripheral units, e.g. input or output ports

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Quality & Reliability (AREA)
  • Multimedia (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

Transmission device includes output port determination section, and according to the storage information stored in the frame inputted, the output port of output frame is determined from multiple ports；Dispenser, the output port for the frame that output is transmitted with direct-passing mode is mapped by it one to one with the input port for being entered frame, according to the classification information for the input port for being entered frame, the category information of frame and the output port that is determined by output port determination section, 1st frame is distributed to the 1st path being transmitted with direct-passing mode, the 2nd frame is distributed to the 2nd path being transmitted with store-and-forward mode；And IET output control unit, the 1st frame is exported from output port, is decided whether to divide the 2nd frame according to the category information of the 2nd frame, the 2nd frame is exported from output port according to decision, therefore, compared with existing transmission device, the low latency transmitting function of IET can be realized by simply controlling.

Description

Transmission device, transfer approach and conveyer system
Technical field
The present invention relates to transmission device, transfer approach and transmission systems with frame received by multiple ports and transmission System.
Background technique
In industry in Ethernet (registered trademark) network, exist in the frame to be transmitted the frame for requiring low latency to transmit and Allow the frame of propagation delay.For example, about the control system frame that the control data to equipment are handled, in order to realize high speed Property, high reliability, sometimes require that stringent delay requirement.In addition, being controlled about to image data, voice data, user data etc. The information system frame that data other than system-frame processed are handled, delay requirement is different according to each class of service, still, with Control system frame is compared, most delay allowance.In the following, the frame for requiring low latency to transmit as control system frame is recorded as low The frame of deferred class.In addition, relative to the frame of low latency class, the frame of less strict and delay allowance transmission is recorded as by delay requirement The frame of general class.The frame of low latency class needs the frame prior to general class to be transmitted.
In the past, the mode for as low latency transmitting frame, there are straight-through (cut-through) modes.Direct-passing mode and one As multiplexer transmission mode i.e. store forwarding (store-and-forward) mode compare, transmit 1 frame data without Temporarily accumulation, therefore, can transmit to low latency.In the case where frame of the frame prior to general class to transmit low latency class, For example, there is the middle stealpass applied by carrying out IEEE 802.3br Plays in the transmission device of non-patent literature 1 Send IET (the Interspersing Express Traffic) technology for reducing the propagation delay time of frame of low latency class MAC(Media Access Control).The transmission device of non-patent literature 1 is directed to each output port, has input port number Straight-through storage unit, which carries out for low latency transmitting the frame of low latency class and the direct-passing mode that inhibits delay Transmission.In IET technology, the case where request of the transmission of the frame of low latency class is produced in the transmission of the frame of general class Under, the transmission of the frame of general class is interrupted in the range of meeting the minimum frame length of Ethernet (registered trademark), to low latency class Frame carry out interruption transmission, the remainder of the frame of general class is transmitted after the transmission of the frame of low latency class.In this way, having Apply the MAC of IET transmission device can reduce low latency class frame the propagation delay time.IET technology is via more Particularly effective technology in the case where the frame of grade transmission device transmission low latency class.
Existing technical literature
Non-patent literature
Non-patent literature 1: gift, the great money of other institute, hole Tian Shanwen, river hand dragon are situated between and write " the side Preemption Frame on well Formula The is studied with い Di Rather-late Yan イ ー サ ネ ッ ト (log in trade mark) ス イ ッ チ and is commented value " general society's team legal person's electronic intelligence is logical Letter association letter learns skill report
Summary of the invention
Subject to be solved by the invention
But in above-mentioned existing transmission device, in the transmission of direct-passing mode, consider to input from multiple input ports low The case where frame of deferred class, needs the straight-through storage unit of input port number for each output port.From the straight-through of input port number Storage unit reads frame and is sent, and accordingly, there exist the outputs of frame to control complicated such problems.
The present invention is completed to solve the problems, such as above-mentioned this, it is intended that providing and existing transmission device Compared to transmission device, transfer approach and the conveyer system of the low latency transmitting function for realizing IET by simply controlling.
Means for solving the problems
Transmission device of the invention includes output port determination section, according to the storage information stored in the frame inputted, The output port of output frame is determined from multiple ports；Dispenser, the output port for the frame that output is transmitted with direct-passing mode It is mapped one to one with the input port for being entered frame, according to the classification information for the input port for being entered frame, the class of frame 1st frame, is distributed to the 1st tunnel being transmitted with direct-passing mode by information and the output port determined by output port determination section 2nd frame is distributed to the 2nd path being transmitted with store-and-forward mode by diameter；And IET output control unit, from output end Mouthful output is assigned to the 1st frame in the 1st path, decides whether segmentation the according to the category information for the 2nd frame for being assigned to the 2nd path 2 frames export the 2nd frame from output port according to decision.
Invention effect
According to the present invention, compared with existing transmission device, it can realize that the low latency of IET is passed by simply controlling Send function.
Detailed description of the invention
Fig. 1 is the functional block diagram of the conveyer system of the transmission device comprising embodiments of the present invention 1.
Fig. 2 is the functional block diagram of the transmission device of embodiments of the present invention 1.
Fig. 3 is the figure for showing an example of frame of IET.
Fig. 4 is the figure of an example of the frame in the middle section and last fragment when showing segmentation.
Fig. 5 is the functional block diagram of the receiving unit of the transmission device of embodiments of the present invention 1.
Fig. 6 is the functional block diagram of another receiving unit of the transmission device of embodiments of the present invention 1.
Fig. 7 is the functional block diagram of the transmission unit of the transmission device of embodiments of the present invention 1.
Fig. 8 is the functional block diagram of another transmission unit of the transmission device of embodiments of the present invention 1.
Fig. 9 is the hardware structure diagram of the transmission device of embodiments of the present invention 1.
Figure 10 is another hardware structure diagram of the transmission device of embodiments of the present invention 1.
Figure 11 is the flow chart for showing the movement of transmission device of embodiments of the present invention 1.
Figure 12 is the flow chart for showing the movement of the receiving unit of transmission device of embodiments of the present invention 1.
Figure 13 is the figure of the class recognition methods based on SMD value.
Figure 14 is the figure for showing an example of class table.
Figure 15 is the figure for showing the input port of the output port being transmitted with direct-passing mode for embodiment 1.
Figure 16 is the flow chart for showing the movement of the transmission unit of transmission device of embodiments of the present invention 1.
Figure 17 is the movement for showing the IET output control unit of the transmission unit of transmission device of embodiments of the present invention 1 Flow chart.
Figure 18 is the functional block diagram of the transmission unit of the transmission device of embodiments of the present invention 2.
Figure 19 is the figure for showing an example when the category information of the frame that will be identified is sent to dispenser as pulse signal, (a) it is the figure for showing the relationship of transmitted frame and time, is (b) relationship for the signal value and time for showing the category information of frame Figure.
Figure 20 is the functional block diagram of the transmission device of embodiments of the present invention 3.
Figure 21 is the functional block diagram of the receiving unit of the transmission device of embodiments of the present invention 3.
Figure 22 is the flow chart for showing the movement of transmission device of embodiments of the present invention 3.
Figure 23 is the movement for showing the IET output control unit of the transmission unit of transmission device of embodiments of the present invention 3 Flow chart.
Specific embodiment
Embodiment 1
Fig. 1 is the functional block diagram of the conveyer system 1 of the transmission device 11a comprising embodiments of the present invention 1.
The terminal installation 21~23 and transmission device that conveyer system 1 has transmission device 11a, connect with transmission device 11a The transmission device 12a of 11a connection, the terminal installation 24~26 being connect with transmission device 12a.Connect between each device via route It connects.
The frame received from terminal installation 21 is for example transmitted to terminal installation 22 by transmission device 11a.In addition, transmission device The frame received from terminal installation 21 is for example transmitted to transmission device 12a by 11a.Transmission device 12a is and transmission device 11a phase Same device.In the transmission device 11a of embodiment 1, it is connected with terminal installation 21 in port 101, is connected in port 102 Transmission device 12a, is connected with terminal installation 22 in port 103, is connected with terminal installation 23 in port 104.Port 101~104 It is able to carry out the input and output of frame.
Transmission device 11a has the MAC for applying IET technology, with low latency transmits the frame of low latency class.It is filled with transmission Set that 11a is same, terminal installation 21,22 and transmission device 12a have the MAC for applying IET technology.Terminal installation 23~26 does not have There is the MAC for applying IET technology, or there is the MAC but do not use IET technology.
In the following, direct-passing mode is simply recorded as leading directly to.In addition, store-and-forward mode to be simply recorded as to storage forwarding.
Frame is transmitted and received between the terminal installation 21 and transmission device 11a of Fig. 1.Terminal installation 21 is control device, communication Device etc..Terminal installation 22~23 is device identical with terminal installation 21.
Frame is transmitted and received between terminal installation 24 and transmission device 12a.Terminal installation 24 is control device, communication device Deng.In terminal installation 24, the transmission device for only transmitting and receiving frame is different from terminal installation 21, and function is identical.Terminal installation 25 ~26 be device identical with terminal installation 24.
In the embodiment 1, terminal installation 21~26 is also handled control system frame and information system frame.It is transmitting In device 11a, port 101,102 is the port supported IET and be able to carry out straight-through transmission.IET transmission will be utilized Port is known as trunking port.In addition, the port of the transmission that only can be carried out storage forwarding other than trunking port is known as terminal end Mouthful.That is, port 101,102 is trunking port, and port 103,104 is terminal prot in transmission device 11a.
Fig. 2 is the functional block diagram of the transmission device 11a of embodiments of the present invention 1.
Transmission device 11a have receiving unit 31a~34a, class table 51, destination solve table 52, combination processing portion 61~62, Switch process portion 71, storage forwarding storage unit 81a~84a, straight-through storage unit 91a~92a, transmission unit 41a~44a.In addition, passing Sending device 12a is structure identical with transmission device 11a.
Receiving unit 31a is the input port of port 101.Receiving unit 31a identifies priority class from other device receiving frames, and And search and output port determines that transmission is connect according to each output port according to input port, priority class, output port information The path of the frame received.The frame sent with direct-passing mode is sent through path by receiving unit 31a, will be sent out with store-and-forward mode The frame sent is sent to storage forwarding access.In Fig. 3, through path is recorded as leading directly to, storage forwarding access is recorded as depositing Storage forwarding access.Receiving unit 31a has the MAC for applying IET technology.Receiving unit 32a is identical as receiving unit 31a.But it receives Portion 32a is the input port of port 102.
Receiving unit 33a is the input port of port 103.Receiving unit 33a determines that transmission is received from other device receiving frames The port of the frame arrived.Receiving unit 33a sends storage forwarding access for the frame received according to the path determined.Receiving unit 33a can also not have the MAC for applying IET technology.Receiving unit 34a is identical as receiving unit 33a.But receiving unit 34a is end The input port of mouth 104.The details of receiving unit 31a~34a is described below.It is connect in addition, being provided with according to each port Receipts portion.
Class table 51 is the table that the category information of the storage information and frame in the frame that will be received is mapped.There are low for category information Deferred class and general class this at least 2 class, it is all kinds of to be further separated into multiple classes.By receiving unit 33a~34a referring to class table 51.Class table 51 is stored in advance in transmission device 11a.
Destination solution table 52 is that the output port information of the storage information and frame in the frame that will be received is mapped Table.Table 52 is solved referring to destination by receiving unit 31a~34a.Table 52 is solved about destination, it can be pre- by transmission device 11a It is first stored, can also be learnt in transmission device 11a according to the storage information in input port and frame, had and one As layer 2 switch the identical function of FDB (Forwarding Database) table.
For transmission device 11a there is 1 class table 51, destination to solve table 52, still, each receiving unit can also have respectively There are class table and destination solution table.
Combination processing portion 61 identifies the class of received frame, forwards access different by the storage from low latency class it General class storage forwarding access be transmitted to switch process portion 71.Combination processing portion 61 also has received by temporarily storage The storage unit of the frame of general class.Combination processing portion 61, which has, judges the whether divided function of the frame of general class, connects being judged as In the divided situation of the frame of the general class received, the combination of the frame received.In the not divided feelings of the frame received Under condition, without combination processing.In addition, combination processing portion 61 can also prolong the frame of the general class received is low with what is received The frame of slow class is multiplexed, and is transmitted by storage forwarding access.In the case where multiplexing, also there is storage low latency class The storage unit of frame.
Combination processing portion 62 has function identical with combination processing portion 61.
Switch process portion 71 carries out 2 switch process of layer.Specifically, switch process portion 71 is according to by receiving unit 31a~34a The output port information of decision and path, the straight-through storage to being connect with the transmission unit of the transmission destination as the frame received Portion or storage forwarding storage section match received frame.Switch process portion 71 to by store the frame that receives of forward-path into After row multiplexing, the storage forwarding storage unit for sending destination is assigned them to.
The received frame of straight-through storage unit 91a storage.Straight-through storage unit 91a is after being entered frame, to the hair connected 41a output in portion is sent to send request.In addition, storage unit 91a is led directly in the case where there is the transmission license from transmission unit 41a, Frame is sent to transmission unit 41a.
Straight-through storage unit 92a is identical as straight-through storage unit 91a.But about straight-through storage unit 92a, instead of transmission unit 41a And become transmission unit 42a.
The received frame of storage forwarding storage unit 81a storage.Storage forwarding storage unit 81a is with priority class unit according to defeated Enter sequence to be managed the frame stored, if storing the frame of 1 frame or more, to the transmission unit 41a output hair connected Send request.In addition, storage forwards storage unit 81a in the case where there is the transmission license from transmission unit 41a, by what is stored In frame, the frame of the higher class of priority be preferentially sent to transmission unit 41a.If the priority of low latency class is higher than the preferential of general class Grade.When sending frame, the frame informations such as category information and frame length of frame also notify to give transmission unit 41a.In the category information and frame length of frame In the case that degree is stored in frame, storage forwarding storage unit 81a is according to the presence or absence of the transmission of transmission unit 41a license, beginning/stopping It sends.
Storage unit 82a is forwarded about storage, becomes transmission unit 42a instead of transmission unit 41a.Storage unit is forwarded about storage 83a becomes transmission unit 43a instead of transmission unit 41a.Storage unit 84a is forwarded about storage, becomes hair instead of transmission unit 41a Send portion 44a.In addition, respectively there is 1 storage to forward storage unit respectively for each transmission unit.
In addition, the frame of straight-through storage unit 91a~92a storage low latency class.Storage forwarding storage unit 81a~84a can be deposited Store up the frame of low latency class and the frame both sides of general class.
Transmission unit 41a is the output port of port 101.Transmission unit 41a is arrived with straight-through or store-and-forward mode transmitting and receiving Frame.Transmission unit 41a has the MAC for applying IET technology.Transmission unit 42a is identical as transmission unit 41a.But transmission unit 42a It is the output port of port 102.
Transmission unit 43a is the output port of port 103.The frame that transmission unit 43a is transmitted and received with store-and-forward mode.Hair The portion 43a of sending can also not have the MAC for applying IET technology.Transmission unit 44a is identical as transmission unit 43a.But transmission unit 44a It is the output port of port 104.The details of transmission unit 41a~44a is described below.In addition, being arranged according to each port There is transmission unit.
Here, the construction of frame is illustrated.
Fig. 3 is the figure for showing an example of frame of IET.
The frame of the not divided IET of Fig. 3 and the segment of divided beginning are by " lead code ", " SMD (StartMframe Derimiter) value ", " data ", " CRC (Cyclic Redundancy Check) " are constituted." data " are general Ethernets The frame of (registered trademark) records the various data comprising " destination MAC Address ", " sending side mac address "." CRC " storage At the end of Ethernet (registered trademark) frame, it is stored with the value i.e. FCS (Frame of the mistake of the data content for detection frame Check Sequence) value.Digital representation byte (byte) number of parenthetic record.Due to being the frame of low latency class, " SMD value " sets " SMD-E ".In addition, " the SMD value " of the frame of the general class of non-segmentation sets " SMD-S ".Divided frame Opening segment be also made of frame identical with Fig. 3.It is stored with " SMD-S " in " SMD value ", " CRC " is stored with detection beginning The mistake of the data content of segment and for indicating divided " MCRC (Mframe CRC) value ".
Fig. 4 is the figure of an example of the frame in the middle section and last fragment when showing segmentation.
The middle section of Fig. 4 and last fragment by " lead code ", " SMD value ", " Frag Count " (segment counting), " data ", " CRC " is constituted." the SMD value " of Fig. 4 sets " SMD-C "." Frag Count " is successively endowed whenever transmitting segment Value, is the value whether being short of for checking segment." CRC " of middle section segment is stored with detection middle section identical with opening segment piece The mistake of the data content of section and for indicating divided " MCRC " is stored with as from opening in " CRC " of last fragment Head segment plays " FCS " value of the data of 1 frame of the data of divided whole segments.
Fig. 5 is the functional block diagram of the receiving unit 31a of the transmission device 11a of embodiments of the present invention 1.It is docked referring to Fig. 5 Receipts portion 31a is described in detail.
Receiving unit 31a has input port identification part 311, class identification part 312a, output port determination section 313, dispenser 314a。
Input port identification part 311 identifies the classification information for being entered the port of frame.The classification information of port is e.g. defeated The different information according to each port such as inbound port number.
The SMD that class identification part 312a is stored from the head of the frame for the IET that terminal installation 21 receives according to dispenser 314a Value identifies low latency class and general class.
Output port determination section 313, from the storage information in the frame that terminal installation 21 receives, is joined according to dispenser 314a Table 52 is solved according to destination, determines the output port of received frame.Output port is sometimes multiple ports.
Dispenser 314a receives the frame of low latency class or the frame of general class from terminal installation 21.Dispenser 314a is according to input The classification information of port, the category information of frame, output port information, if it is the frame of the low latency class transmitted to transmission unit 42a, then Distribute to through path, to transmission unit 42a other than port transmission low latency class frame and all the frame of general classes is distributed to Storage forwarding access.The port being transmitted be also sometimes it is multiple, according to each transfer destination port, for received Frame decision is therefore the frame of low latency class is transmitted to two paths sometimes by through path or storage forward-path.
Category information and output port information are stored in the item of " head " or " data " of frame when transmitting frame by dispenser 314a In mesh.
The functional block diagram of receiving unit 32a is identical as receiving unit 31a.But dispenser 314a is low from transmission device 12a reception The frame of the frame of the class of delay or general class will be output to the frame of the low latency class of transmission unit 41a to through path transmission.
Fig. 6 is the functional block diagram of the receiving unit 33a of the transmission device 11a of embodiments of the present invention 1.It is docked referring to Fig. 6 Receipts portion 33a is described in detail.
Receiving unit 33a is structure identical with receiving unit 31a.But it is also possible to not install the MAC function of IET.In addition, Dispenser 314b from terminal installation 22 receive low latency class frame or general class frame.Class identification part 312b is according to dispenser Storage information in the frame that 314b is received identifies that received frame is the frame of low latency class or general referring to class table 51 The frame of class.In addition, class identification part 312b there can also be class table 51 according to each receiving port, received according to dispenser 314b Frame frame in storage information identification low latency class and general class.In turn, dispenser 314b is identical as dispenser 314a, but It is, regardless of the category information of frame is low latency class or general class, frame all to be transmitted by storage forwarding access.
The functional block diagram of receiving unit 34a is identical as receiving unit 33a.But dispenser 314b received from terminal installation 23 it is low The frame of the frame of deferred class or general class.
Fig. 7 is the functional block diagram of the transmission unit 41a of the transmission device 11a of embodiments of the present invention 1.Referring to Fig. 7 to hair The portion 41a of sending is described in detail.
Transmission unit 41a has IET output control unit 411a, class extraction unit 412.
Class extraction unit 412 extracts the class assigned by dispenser 314b to frame from the frame received by storage forwarding access Information.
There is the frame from through path in the transmission of the frame from storage forwarding access in IET output control unit 411a In the case where sending request, according to the category information extracted by class extraction unit 412, determine with store-and-forward mode transmission Whether frame can be divided.In the case where category information is low latency class, the frame transmitted is being output to without segmentation After until last, the frame of through path is exported.In addition, if storage forwarding side frame be general class frame, then with common IET Output control it is same, according to the transmission state of frame, the frame from through path is able to carry out interruption transmission.In addition, IET is exported Control unit 411a assigns SMD-E value when output stores the frame of the low latency class of forwarding access without being split, to the head of frame.
The functional block diagram of transmission unit 42a is identical as transmission unit 41a.
Fig. 7 is the functional block diagram of the transmission unit 43a of the transmission device 11a of embodiments of the present invention 1.Referring to Fig. 7 to hair The portion 43a of sending is described in detail.
Transmission unit 43a, which has, successively to be sent with the output control unit 411b of the frame of store-and-forward mode transmission.Transmission unit 43a It does not need with class extraction unit 412, but it is also possible to have class extraction unit 412.
The path that receiving unit by receiving frame determines is only the path being transmitted with store-and-forward mode, therefore, defeated Control unit 411b is exported out with store-and-forward mode.In addition, output control unit 411b is not entered and is transmitted with direct-passing mode Frame, therefore, there is no need to carry out based on IET interruption transmission.
The functional block diagram of transmission unit 44a is identical as transmission unit 43a.
Then, the hardware configuration of the transmission device 11a in embodiment 1 is illustrated.
Fig. 9 is the hardware structure diagram of the transmission device 11a of embodiments of the present invention 1.Using Fig. 9 to implementation of the invention The structure of the transmission device 11a of mode 1 is illustrated.
Transmission device 11a is made of bus 111, processing circuit 116.
Bus 111 is the signal path for making to be electrically connected and send between each device receiving frame.
Processing circuit 116 is, for example, single circuit, compound circuit, the processor of sequencing, ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array) or to they carry out Component obtained from combination.Processing circuit 116 uniformly realizes receiving unit 31a~34a, class table 51, address solution by processing circuit Certainly table 52, combination processing portion 61a~62a, switch process portion 71, straight-through storage unit 91a~92a, storage forwarding storage unit 81a~ The function in each portion of 84a, transmission unit 41a~44a.In addition, processing circuit 116 can also be realized respectively by each processing circuit Receiving unit 31a~34a, class table 51, address solve table 52, combination processing portion 61a~62a, switch process portion 71, straight-through storage unit The function of 91a~92a, storage forwarding storage unit 81a~84a, transmission unit 41a~44a.
Figure 10 is another hardware structure diagram of the transmission device 11a of embodiments of the present invention 1.Using Figure 10 to transmission Another structure of device 11a is illustrated.
Each function of transmission device 11a is realized by the combination of software, firmware or software and firmware.Software, firmware, Or it is program that the combination of software and firmware, which describes,.
Transmission device 11a has bus 111, input/output interface 112, memory 113, storage medium 114, CPU Hardware as (Central Processing Unit) 115.In addition, in the following, input/output interface 112 be recorded as inputting it is defeated IF112 out.
Same as Fig. 9, bus 111 is will to be electrically connected and send the signal path of receiving frame between each device.
Input and output IF112 transmits and receives frame.Receiving unit 31a~34a and transmission unit 41a~44a pass through input and output IF112 is realized.
Memory 113 is functioned as the workspace for being loaded into the program stored in storage medium 114.Memory 113 RAM (Random Access Memory) in this way.
Storage medium 114 stores the program for determining that the program of transmitting path, the program for carrying out output control etc. realize function. In addition, storage medium 114 stores frame data, the classification information of input port, output port information, category information etc..Storage medium 114 be, for example, ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory) or HDD (Hard Disk Drive) etc. non-volatile or volatile semiconductor memory.Storage medium 114 also stores OS (Operating System).Receiving unit 31a~34a, class table 51, destination solve table 52, combination processing portion 61~62, storage forwarding storage unit 81a~84a, straight-through storage unit 91a~92a are realized by storage medium 103.
CPU115 is connect via bus 111 with other devices, is controlled these each portions.CPU115 reads in and executes It is loaded into the program of the storage medium 114 in memory 113.CPU115 is by least part of the OS stored in storage medium 114 It is loaded into memory 113, executes OS and executes program.CPU115 is the IC (Integrated handled Circuit).In addition, CPU is also possible to central processing unit, arithmetic unit, microprocessor, microcomputer, processor, DSP (Digital Signal Processor).CPU115 reads in and executes the journey for the storage medium 114 being loaded into memory 113 Sequence is achieved in receiving unit 31a~34a, combination processing portion 61~62, switch process portion 71, transmission unit 41a~44a.
In addition, the information of each device, frame, signal value etc. are stored in memory 113, storage medium 114 or CPU115 Register or cache memory in.
In addition, memory 113 and storage medium 114 can not also area's departmentalism and become identical device.
In turn, program can be stored in disk, floppy disk, CD, compact disc, DVD (Digital Versatile Disc in movable recording media as).
In turn, table 52, combination processing portion are solved about receiving unit 31a~34a of transmission device 11a, class table 51, destination 61~62, switch process portion 71, storage forwarding storage unit 81a~84a, straight-through storage unit 91a~92a, transmission unit 41a~44a Each function, a part can be realized by specialized hardware, pass through software or firmware and realize a part.For example, it can be close Table 52, combination processing portion 61~62, switch process portion 71, straight-through storage are solved in receiving unit 31a~34a, class table 51, destination Portion 91a~92a, storage forwarding storage unit 81a~84a, realize its function by the processing circuit as specialized hardware, about hair It send portion 41a~44a, processing circuit, that is, CPU115 to read and execute the program stored in storage medium 114, is achieved in its function Energy.Processing circuit can realize each function of transmission device 11a by hardware, software, firmware or their combination.
Then, the movement of transmission device 11a is illustrated.
Figure 11 is the flow chart for showing the movement of transmission device 11a of embodiments of the present invention 1.Figure 11 shows output end The movement of transmission device 11a in the case where mouthful for 1 port.Using Figure 11, the movement of transmission device 11a is said below It is bright.
In step s101, receiving unit 31a from terminal installation 21 receive low latency class frame or general class frame, determine The path of the received frame of transmission.Receiving unit 31a is according to the path determined, in the frame received with direct-passing mode transmission In the case where, through path is assigned them to, with the received frame of store-and-forward mode transmission, is distributed Access is forwarded to storage.The frame received is transmitted to multiple ports sometimes by receiving unit 31a.In this case, receiving unit 31a has When by frame be output to through path and storage forwarding access both sides.Receiving unit 32a~receiving unit 34a is identical as receiving unit 31a.But It is that receiving unit 33a and 34a are only exported to storage forwarding access.
In step s 102, receiving unit 31a is in the case where distributing to through path for the frame received, step S102 at For "Yes", S106 is entered step.Receiving unit 31a is in the case where distributing to storage forwarding access for the frame received, step S102 becomes "No", enters step S103.Receiving unit 32a is identical as receiving unit 31a.
In step s 102, receiving unit 33a~34a is regardless of the category information of frame is low latency class or general class, all by frame Distribute to storage forwarding access.Therefore, step S102 becomes "No", enters step S103.
In step s 103, combination processing portion 61 passes through storage forwarding access receiving frame from receiving unit 31a.Combination processing portion Whether the received frame of 61 judgements is divided.
In step s 103, it is the frame (step S103: yes) of " SMD-E " if it is the SMD value of the frame received, then combines Processing unit 61 directly forwards access to be transmitted by the storage of low latency class.If the frame that step 103 is "No", receives SMD value be " SMD-S " or " SMD-C ", then in step S104, combination processing portion 61 in the storage unit of general class temporarily Store frame data.(step S104: yes) is in step s105 combined divided segment in divided situation, Access is forwarded to be transmitted by the storage of general class with frame unit.In not divided situation (step S104: no), in conjunction with Processing unit 61 forwards access to be transmitted with frame unit without combination processing by the storage of general class.In addition, junction Reason portion 62 is identical as combination processing portion 61.
In step s 106, switch process portion 71 passes through through path receiving frame from receiving unit 31a.Switch process portion 71 from Combination processing portion 61 passes through storage forwarding access receiving frame.Switch process portion 71 passes through through path receiving frame from receiving unit 32a. Switch process portion 71 passes through storage forwarding access receiving frame from combination processing portion 62.Switch process portion 71 passes through from receiving unit 33a Storage forwarding access receiving frame.Switch process portion 71 passes through storage forwarding access receiving frame from receiving unit 34a.Switch process portion 71 The frame received by storage forwarding access is multiplexed, the storage forwarding storage unit of each output port is distributed to.
For example, from receiving unit 31a receiving frame and in the case that frame is transmitted to port 102 with direct-passing mode, at switch Reason portion 71 sends frames to straight-through storage unit 92a.
In addition, for example, from receiving unit 31a receiving frame and the case where frame is transmitted to port 102 with store-and-forward mode Under, switch process portion 71 sends frames to storage forwarding storage unit 82a.
In step s 107, the frame transmitted with direct-passing mode that storage unit 91a storage is sent from switch process portion 71 is led directly to. Straight-through storage unit 91a will indicate that frame is present in straight-through storage unit when storing byte number pre-determined from the beginning of frame 91a and the transmission that can be sent request to be sent to transmission unit 41a.Here, pre-determined byte numerical example 6byte in this way, 64byte etc..Sending request is, for example, the level signal indicated whether or not there is in the presence of the frame for wishing to send.Straight-through storage unit 92a have with The straight-through identical function of storage unit 91a.
In step s 107, storage forwarding storage unit 81a storage sent from switch process portion 71 with store-and-forward mode The frame of transmission.Storage forwarding storage unit 81a is directed to multiple priority class, carries out pipe to the frame inputted according to every class according to input sequence It manages and stores.Storage forwarding storage unit 81a, there are in the case where frame more than 1 frame, will be indicated in storage forwarding storage unit 81a The transmission request that can be sent is sent to transmission unit 41a.Sending request is, for example, the electricity indicated whether or not there is in the presence of the frame for wishing to send Ordinary mail number.In addition, storage forwards storage unit 81a in the case where there is the transmission license from transmission unit 41a, by what is stored In frame, the frame of the higher class of priority be preferentially sent to transmission unit 41a.When sending frame, the frames such as category information and frame length of frame Information also notifies to give transmission unit 41a.The category information and frame length of frame can store in the beginning as head or data in frame In the part of segment.According to whether there is or not the transmission of transmission unit 41a license, beginning/stopping is sent storage forwarding storage unit 81a.Storage Forward storage unit 82a~84a that there is function identical with storage forwarding storage unit 81a.But storage unit 83a is forwarded in storage In 84a, transmission request can not also be sent, only according to input sequence, is preferentially sent according to the transmission speed of output port excellent The first higher frame of class.In addition, in this case, can not also notify frame information.
In step S108, transmission unit 41a, which is received, sends request.Transmission unit 41a is forwarded to straight-through storage unit 91a or storage Storage unit 81a sends the reading license of frame.Transmission unit 41a is forwarded from the straight-through storage unit 91a or storage for having sent transmission license Storage unit 81a receiving frame.Transmission unit 41a will have sent in the straight-through storage unit 91a for sending license or storage forwarding storage unit 81a Either side low latency the frame of class or the frame of general class be sent to terminal installation 21.Transmission unit 42a and transmission unit 41a phase Together, still, the device connecting with sending port 102 is transmission device 12a.
In step S108, transmission unit 43a can not also receive transmission request.In the case where receiving transmission request, hair The transmission license for sending portion 43a to send frame to storage forwarding storage unit 83a.Transmission unit 43a is received from storage forwarding storage unit 83a Frame.Transmission unit 43a to terminal installation 22 send low latency class frame or general class frame.Do not receiving the case where sending request Under, if forwarding storage unit 83a receiving frame from storage, transmission unit 43a sends received frame.Transmission unit 44a and transmission Portion 43a is identical.
Figure 12 is the flow chart for showing the movement of the receiving unit 31a of transmission device 11a of embodiments of the present invention 1.Make With Figure 12, the movement of the step S101 of Figure 11 is described in detail below.
Dispenser 341a receives the frame of low latency class or the frame of general class, in step s 201, input from terminal installation 21 Port identification portion 311 identifies the classification information for being entered the input port of frame.In the embodiment 1, the classification letter of input port Breath is set as input port number.It is port 101 that input port number, which is stored in advance, in input port identification part 311.Input port is known The information of classification information, that is, port 101 of input port is output to dispenser 341a by other portion 311.Receiving unit 32a~34a's is defeated Inbound port identification part 311 is movement identical with the input port identification part 311 of receiving unit 31a.
In step S202, class identification part 312a, 312b is according to the storage information in the frame received, received by identification Frame be the frame of low latency class or the frame of general class.The class identification part 312a of the receiving unit 31a of Fig. 5 is shown without reference to class table Situation, the class identification part 312b of the receiving unit 33a of Fig. 6 are shown referring to the case where class table.
Figure 13 is the figure for showing the class recognition methods based on SMD value of class identification part 312a.
In Figure 13, use SMD value as the storage information in the frame received.
As shown in figure 13, the case where storage information of the class identification part 312a in the frame received i.e. SMD value is SMD-E Under, it is identified as the frame that frame is low latency class.In addition, storage information i.e. SMD value of the class identification part 312a in the frame received is In the case where SMD-S or SMD-C, it is identified as the frame that frame is general class.
Figure 14 is the figure for showing an example of class table 51.
Class table 51 shown in Figure 14 is following table: using destination IP address as the storage letter in the frame received Breath, and the category information of the destination IP address of the frame received and frame is mapped.
Class identification part 312b class table 51 shown in 4 referring to Fig.1, storage information i.e. destination IP in the frame received In the case that location is AA.AA.AA.AA, it is identified as the frame that frame is low latency class and is identified as frame in the case where CC.CC.CC.CC It is the frame of general class.Storage information in class table 51 in frame corresponding with class is not limited to destination IP address.It can also combine more Storage information in the frame of a classification and be mapped with class.In addition, if corresponding class is also categorized as low latency class and one As class, then it is all kinds of in can have multiple classes.
1 class table 51 can be installed in a device, class table 51 can also be installed according to each receiving unit.
Return to the step S202 of Figure 12.The category information of frame is output to dispenser 314a by class identification part 312a.Category information is Low latency class or general class.In addition, the class identification part 312a of receiving unit 32 is identical with the class identification part 312a of receiving unit 31a Movement.The category information of frame is output to dispenser 314b by class identification part 312b.Category information is low latency class or general class.In addition, The class identification part 312b of receiving unit 34a is movement identical with the class identification part 312b of receiving unit 33a.
In step S203, output port determination section 313 determines the output port of the frame received from terminal installation 21.It is defeated Exit port determination section 313 solves table 52 referring to destination and determines received by transmission according to the storage information in the frame received Frame output port.
Table 52 is solved about destination to exist according to the destination MAC Address or VLAN (Virtual in frame as an example Local Area Network) label information etc. determines the FDB table that the general layer 2 of output port switchs, still, as long as with In the table for determining output port, it is not particularly limited.In output port determination section 313, table 52 will be solved by destination The output port information of decision is output to dispenser 314a.Output port is also possible to multiple ports.
The output port determination section 313 of receiving unit 32a~34a is identical as the output port determination section 313 of receiving unit 31a Movement.
In step S204, dispenser 314a receives the classification information of input port, frame from class identification part 312a Category information, the output port information from output port determination section 313.
Dispenser 314a is determined according to the classification information of input port, the category information of frame and output port information by depositing Storage forwarding access or through path transmit frame, and frame is distributed to determined path.In addition, through path only transmits low latency The frame of class, 1 input port correspond to 1 output port.
Figure 15 is an example for showing the output port of the input port with direct-passing mode transmission for embodiment 1.
It is such for the defeated of the input port transmitted with direct-passing mode that dispenser 314a stores Figure 15 in the form of a bitmap The correspondence of exit port.The output port bitmap of Figure 15 from right side corresponding to port 101, port 102, port 103, port 104, For " 1 " port show it is straight-through.Transmission device 11a is for the pre-determined input terminal transmitted with direct-passing mode of each output port Mouthful.Therefore, in output port bitmap, according to each output port, in any one port in input port only 1 at For " 1 ".Transmission device 11a does not need the straight-through storage unit with input port number, and transmission control is simple.Additionally it is possible to anti- The only increase of circuit scale.In the embodiment 1, in the case where being transmitted from port 101 to port 102 and from port 102 In the case where being transmitted to port 101, it can be transmitted with direct-passing mode.In addition, in the embodiment 1, being set as in port 101 It is two-way between port 102 to be transmitted with direct-passing mode, still, for example, it is also possible to only from port 101 to port It can be transmitted in the case where 102 transmission with direct-passing mode, it cannot be into the case where being transmitted from port 102 to port 101 The straight-through transmission of row.In addition, being arbitrary with the port that direct-passing mode is transmitted.It, can not but for an output port It is transmitted from multiple input ports with direct-passing mode.It, only can be from an input port with straight-through for multiple output ports Mode is transmitted.
Dispenser 314a is the frame of low latency class for the object of frame, classification information and output port to input port with Figure 15 is checked.If verification is consistent, the frame of object is transmitted to through path.In addition, class of the dispenser 314a in frame Though information be general class or be low latency class verification it is inconsistent in the case where, pass through storage forwarding access and transmit object Frame.
Dispenser 314a assigns the category information and output port information of the frame for object when transmitting frame.The tax of information The mode of giving can store in the head of frame or data, as long as with frame unit these information can be carried out with the side of one-to-one management Method is not particularly limited.
Return to the step S204 of Figure 12.In addition, the dispenser 314a of receiving unit 32a is the dispenser with receiving unit 31a The identical movement of 314a.
The dispenser 314b of receiving unit 33a or receiving unit 34a is movement identical with the dispenser 314a of receiving unit 31a, But in Figure 15, straight-through via not set in the path of input port 103 or input port 104, therefore, regardless of frame Category information is low latency class or general class, and frame is all distributed to storage forwarding access.
Figure 16 is the flow chart for showing the movement of the transmission unit 41a of transmission device 11a of embodiments of the present invention 1.Make With Figure 16, the movement of the step S108 of Figure 11 is described in detail below.
In step S301, class extraction unit 412 receives the frame stored in storage forwarding storage unit 81a.Class extraction unit 412 from The category information being stored in frame by dispenser 314a is extracted in frame.The category information of the frame extracted is output to by class extraction unit 412 IET output control unit 411a.The class extraction unit 412 of transmission unit 42a is movement identical with the class extraction unit 412 of transmission unit 41a.
In step s 302, IET output control unit 411a exports the frame received from straight-through storage unit 91a.In addition, IET The frame that output control unit 411a output is received from storage forwarding storage unit 81a.IET output control unit 411a turns according to store The category information of the frame of originating party formula transmission decides whether to be split the frame stored in storage forwarding storage unit 81a.In segmentation frame In the case where, IET output control unit 411a segmentation frame is simultaneously exported.The IET output control unit 411a of transmission unit 42a and transmission Portion 41a is identical.The output control unit 411b's of the IET output control unit 411a and transmission unit 43a~44a of transmission unit 41a~42a Details is described below.
Figure 17 is the IET output control unit for showing the transmission unit 41a of transmission device 11a of embodiments of the present invention 1 The flow chart of the movement of 411a.Using Figure 17, the movement of the step S302 of Figure 16 is described in detail below.
IET output control unit 411a is received after sending request from straight-through storage unit 91a or storage forwarding storage unit 81a, Start to be handled.
In step S401, IET output control unit 411a is received from straight-through storage unit 91a and is sent request.IET output control Portion 411a from straight-through storage unit 91a receive transmission request in the case where, be judged as be stored in straight-through storage unit 91a it is low The frame of deferred class, step S401 become "Yes", enter step S404.IET output control unit 411a is not from straight-through storage unit 91a In the case where receiving transmission request, it is judged as in straight-through storage unit 91a that the not stored frame for having low latency class, step S401 become "No" enters step S402.The step S401 of the IET output control unit 411a of transmission unit 42a is identical as transmission unit 41a.
In step S402, permit in IET output control unit 411a to the transmission that storage forwarding storage unit 81a sends frame In the case of or IET output control unit 411a storage forwarding storage unit transmitted by the transmission and being judged as that IET interrupts frame In the case where the frame stored in 81a, step S402 becomes "Yes", enters step S403.In IET output control unit 411a not to depositing In the case that storage forwarding storage unit 81a sends license and IET output control unit 411a is not interrupted from storage forwarding storage In the case where the transmission of the frame of portion 81a, step S402 becomes "No", enters step S409.The IET of transmission unit 42a exports control The step S402 of portion 411a is identical as transmission unit 41a.
In step S409, the feelings for sending request are received from storage forwarding storage unit 81a in IET output control unit 411a Under condition, it is judged as and is stored with frame in storage forwarding storage unit 81a, step S409 becomes "Yes", enters step S410.In IET Output control unit 411a from storage forwarding storage unit 81a do not receive transmission request in the case where, step S409 become "No", return Return step S401.The step S409 of the IET output control unit 411a of transmission unit 42a is identical as transmission unit 41a.
In step S410, it is judged as the biography at first stored in storage forwarding storage unit 81a in IET output control unit 411a In the case that the frame sent is low latency class, step S410 becomes "Yes", enters step S411.In step S411, IET output control Portion 411a processed sends license to storage forwarding storage unit 81a, forwards storage unit 81a receiving frame from storage.IET output control Portion 411a assigns SMD-E to the SMD value of the head of the frame transmitted at first stored in storage forwarding storage unit 81a, by what is received The pre-determined byte number of frame is transmitted to terminal installation 21.Pre-determined byte numerical example 1byte, 2byte in this way etc., are true Recognize the period whether frame comes straight-through storage unit 91a.After step S411, return step S401.
In step S410, it is judged as the biography at first stored in storage forwarding storage unit 81a in IET output control unit 411a In the case that the frame sent is not low latency class, step S410 becomes "No", enters step S412.In step S412, IET output Control unit 411a sends license to storage forwarding storage unit 81a, forwards storage unit 81a receiving frame from storage.IET output control Portion 411a processed assigns SMD-S to the SMD value of the head of the frame received, and the pre-determined byte number of the frame received is transmitted to Terminal installation 21.Pre-determined byte numerical example 1byte, 2byte in this way etc., are whether acknowledgement frame comes straight-through storage unit 91a Period.Start the transmission of progress frame.After step S412, return step S401.
The step S410 of the IET output control unit 411a of transmission unit 42a is identical as transmission unit 41a.
In step S403, the transmission license of frame is had sent to storage forwarding storage unit 81a in IET output control unit 411a In the case where, storage forwarding storage unit 81a continues the frame in transmission being transmitted to transmission unit 41a.Alternatively, starting again at will interrupt The frame of transmission is transmitted to transmission unit 41a.IET output control unit 411a forwards storage unit 81a receiving frame from storage, will receive The pre-determined byte number of frame be transmitted to terminal installation 21.Pre-determined byte numerical example 1byte, 2byte in this way etc. are Whether acknowledgement frame comes the period of straight-through storage unit 91a.In addition, IET output control unit 411a transmitting storage forwarding deposit In the case where the frame of storage portion 81a, the pre-determined byte number of the frame transmitted is transmitted to terminal installation 21.In step After S403, return step S401.Whether acknowledgement frame comes straight-through storage unit 91a to IET output control unit 411a periodically, because This can forward storage in midway in the case where transmission stores the whole frame stored in forwarding storage unit 81a and spends the time The frame stored in storage unit 81a is split, and Xiang Zhitong storage unit 91a preferentially transmits the frame of low latency class.Transmission unit 42a's The step S403 of IET output control unit 411a is identical as transmission unit 41a.
On the other hand, in step s 404, IET output control unit 411a is having sent frame to storage forwarding storage unit 81a Transmission license in the case where, be judged as and transmitting the frame that stores in storage forwarding storage unit 81a, step S404 becomes "Yes" enters step S406.The transmission license of frame is not sent to storage forwarding storage unit 81a in IET output control unit 411a In the case of, step S404 becomes "No", enters step S405.The step S404 of the IET output control unit 411a of transmission unit 42a with Transmission unit 41a is identical.
In step S406, IET output control unit 411a is low latency in the category information of the frame inputted from class extraction unit 412 In the case where class, it is judged as that the frame transmitted stored in storage forwarding storage unit 81a is the frame of low latency class, step S406 As "Yes", S407 is entered step.IET output control unit 411a is judged as and deposits in the case where the category information of frame is general class The frame transmitted stored in storage forwarding storage unit 81a is not the frame of low latency class, and step S406 becomes "No", enters step S408.The step S406 of the IET output control unit 411a of transmission unit 42a is identical as transmission unit 41a.
In step S 407, the frame transmitted that IET output control unit 411a will be stored in storage forwarding storage unit 81a It is transmitted to terminal installation 21, until the end of 1 frame.After step S407, S405 is entered step.The IET of transmission unit 42a The step S407 of output control unit 411a is identical as transmission unit 41a.
In step S408, the frame transmitted stored in storage forwarding storage unit 81a is the frame of general class.IET is defeated Control unit 411a carries out interruption transmission to the frame stored in straight-through storage unit 91a out.About the frame after the segmentation based on IET, example Such as, the frame length of the frame at the end after segmentation must be the i.e. pre-determined byte of minimum frame length of Ethernet (registered trademark) It more than number, about the frame other than the end after segmentation, needs to meet specified with byte number more than pre-determined byte number Minimum frame length.Here, pre-determined byte numerical example 6byte, 64byte in this way etc..Meeting above-mentioned this divisible condition In the range of, IET output control unit 411a interrupts the transmission of the frame of general class.After step S408, return step S401.Hair Send the step S408 of the IET output control unit 411a of portion 42a identical as transmission unit 41a.
On the other hand, in step S405, IET output control unit 411a is permitted to the transmission that straight-through storage unit 91a sends frame It can.Frame is transmitted to transmission unit in the case where the transmission license that there is the frame from transmission unit 41a by straight-through storage unit 91a 41a.After straight-through storage unit 91a storage byte number pre-determined from the beginning of frame, frame is transmitted.IET output control unit 411a From straight-through storage unit 91a receiving frame.The whole frame stored in straight-through storage unit 91a is transmitted to end by IET output control unit 411a End device 21.After step S405, return step S401.The step S405 of the IET output control unit 411a of transmission unit 42a with Transmission unit 41a is identical.
In addition, the output control unit 411b of transmission unit 43a is transmitted always with store-and-forward mode, and therefore, output control Portion 411b processed sends transmission license and the receiving frame of frame to storage forwarding storage unit 83a.Output control unit 411b will be received Frame is transmitted to terminal installation 22.
The movement of the output control unit 411b of transmission unit 44a and the output control unit 411b of transmission unit 43a are identical.
Above-mentioned this processing is repeated, disconnects the triggering that processing terminate such as power supply or progress end operation until existing Until.As a result, compared with existing transmission device, so that the low latency transmitting function of IET is become lesser circuit scale, can drop Low cost.In addition, being set as that above-mentioned this processing is repeated, but it is also possible to not be repeated and only carry out primary.
As described above, in the transmission device 11a of present embodiment 1, comprising: output port determination section 313, according to institute The storage information stored in the frame of input determines the output port of output frame from multiple ports；Dispenser 314a, will output It is mapped one to one with the output port of frame of direct-passing mode transmission with the input port for being entered frame, according to being entered frame The classification information of input port, the category information of frame and the output port determined by output port determination section, the 1st frame is distributed to 2nd frame, is distributed to the 2nd path being transmitted with store-and-forward mode by the 1st path being transmitted with direct-passing mode；And IET output control unit 411a is assigned to the 1st frame in the 1st path from output port output, according to being assigned to the 2nd path The 2nd frame category information decide whether divide the 2nd frame, according to determine from output port export the 2nd frame therefore can pass through letter Single low latency transmitting function controlled to realize IET.Transmission device 11a does not need have input terminal for each output port Therefore the straight-through storage unit of mouth number compared with existing transmission device, makes the low latency transmitting function of IET become lesser electricity Road scale, can reduce cost.In the transmission device with input/output ports more than 3 ports, transmit to low latency It is required that the frame of low latency, also, compared with existing transmission device, it can realize that the low of IET is prolonged by simply controlling Slow transmitting function.
In addition, in the transmission device 11a of present embodiment 1, IET output control unit 411a is in the category information of the 2nd frame In the case where low latency class, the 2nd frame is not exported with being split to the 2nd frame, therefore, even with store-and-forward mode transmission Frame can then be controlled by the output of IET and be transmitted without being split if it is the frame of low latency class.
In turn, in the transmission device 11a of present embodiment 1, not as the path setting being transmitted with direct-passing mode Path do not need straight-through storage unit relative to transmission unit and therefore can reduce memory capacity.Therefore, circuit rule are able to carry out The diminution of mould and the reduction of cost.
In addition, being set as and this terminal installation 21~23 of Fig. 1 and biography in the transmission device 11a of above-mentioned present embodiment 1 Device 12a connection is sent, still, terminal installation or transmission device connect altogether 3 or more, can be several.The situation Under, with the quantity for the device being connect accordingly, receiving unit, transmission unit, combination processing portion, straight-through storage unit, storage forwarding are deposited The quantity in storage portion etc. also changes.The transmission device 11a constituted in this way can also obtain the effect of above embodiment 1.
In the conveyer system of above-mentioned present embodiment 1, there is connection transmission device 11a and transmission device 12a and frame passes through By the path of 2 grades of transmission devices, but it is also possible to which there are frames via the path of multistage transmission device.Such as from terminal installation In the case that 22 send the frame of low latency class via transmission device 12a to terminal installation 26, due to not setting from terminal installation 22 Therefore the path being transmitted to transmission device 12a with direct-passing mode is transmitted with store-and-forward mode, still, if set Determined the path being transmitted from transmission device 12a to terminal installation 26 with direct-passing mode, then it can be in the transmission after the 2nd grade The propagation delay of frame is reduced in device.Particularly, it can transmit to low latency the more via series of transmission device and require low The frame of delay.
In addition it is also possible in the presence of only via the path of a transmission device.The transmission device 11a constituted in this way can also be obtained To the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, by the port 101 being connect with terminal installation 21 and with transmission It is set as the path being transmitted with direct-passing mode between the port 102 of device 12a connection, still, for example, it is also possible to will be with end It is set as being transmitted with direct-passing mode between the port 103 of the connection of end device 22 and the port 104 connecting with terminal installation 23 Path.It is arbitrary between port as the path setting being transmitted with direct-passing mode.The transmission device constituted in this way 11a can also obtain the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, if dispenser 314a be incorporate output port determination section and Obtained from dispenser, still, output port determination section and dispenser can also become structure independently.It constitutes in this way Transmission device 11a can also obtain the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, IET output control unit 411a and class extraction unit 412 become point Not independent structure, but it is also possible to be set as obtained from merging IET output control unit 411a and class extraction unit 412.In this way The transmission device 11a of composition can also obtain the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, by frame classification be low latency class and general class, however, it is possible to With also additional priority is classified in the frame of low latency class.In addition, transmission device 11a can also be in the frame of general class Additional priority is classified.In turn, transmission device 11a can be divided according to each output port additional priority of frame Class.Several subclasses can be arranged in transmission device 11a in the class of frame.Specifically, for example, transmission device 11a is in low latency In the case that also additional priority is classified in the frame of class, the straight-through storage unit of priority class quantity can have, carrying out directly When logical transmission, in multiple low latency classes, it is transmitted from the higher frame of priority.At this point, transmission device 11a is additionally by table Show that the category information of subclass is stored in " data " of frame.The transmission device 11a constituted in this way can also obtain above embodiment 1 Effect, and can further add subclass.
In the transmission device 11a of above-mentioned present embodiment 1, if terminal installation 21,22 and transmission device 11a~12a tool There is the MAC for applying IET technology, with low latency transmits the frame of low latency class.In addition, transmission device 11a sets input port Classification information is input port number.But can also to set the classification information of input port preparatory as each port by transmission device 11a The IET of the port of storage is corresponding with no information.That is, IET be corresponding with no information be the device that is connect with the port whether with IET Corresponding information.In this case, setting a part of only terminal installation and transmission device has the MAC for applying IET technology.Transmission Device 11a be identified as in each port only port corresponding with IET set it is straight-through.The transmission device 11a constituted in this way also can Obtain the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, if terminal installation 21,22 and transmission device 11a~12a tool There is the MAC for applying IET technology, with low latency transmits the frame of low latency class.In addition, transmission device 11a sets input port Classification information is input port number.But transmission device 11a can also set the classification information of input port as connection equipment letter Breath.Connection facility information refer to, and input port connection equipment whether be terminal installation corresponding with IET, whether be not with The corresponding terminal installation of IET, whether be and the corresponding transmission device of IET, whether be transmission device not corresponding with IET etc. with it is assorted The information of the device connection of sample.Connection facility information can be set in advance in transmission device 11a, or be documented in and to be received Frame in.In this case, setting a part of only terminal installation and transmission device has the MAC for applying IET technology.Transmission device 11a is identified as setting between only device corresponding with IET straight-through.The transmission device 11a constituted in this way can also obtain above-mentioned reality Apply the effect of mode 1.
In the transmission device 11a of above-mentioned present embodiment 1, if terminal installation 21,22 and transmission device 11a~12a tool There is the MAC for applying IET technology, with low latency transmits the frame of low latency class.In addition, transmission device 11a sets input port Classification information is input port number.But can also to set the classification information of input port preparatory as each port by transmission device 11a The IET of the port of storage is corresponding with the combination of no information and input port number.By being combined, it is known that compile which port It is number corresponding with IET.In this case, setting a part of only terminal installation and transmission device has the MAC for applying IET technology.It passes Send device 11a be identified as only port numbering corresponding with IET set it is straight-through.In addition, the combination of the classification information of input port It is arbitrary.The transmission device 11a constituted in this way can also obtain the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, if terminal installation 21,22 and transmission device 11a~12a tool There is the MAC for applying IET technology, with low latency transmits the frame of low latency class.In addition, storage of the class identification part 312a according to frame Information, that is, frame destination IP address or SMD value and class table 51, identify the class of frame.But transmission device 11a can also be according to each The IET of the pre-stored the port in port is corresponding with no information to identify the class of frame.In this case, setting only terminal installation and transmission A part of device has the MAC for applying IET technology.Transmission device 11a can also be by port corresponding with IET in each port Between the frame that transmits be identified as the frame of low latency class, by the frame comprising being transmitted between the port including port not corresponding with IET It is identified as the frame of general class.The transmission device 11a constituted in this way can also obtain the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, class identification part 312a is according to storage information, that is, frame mesh of frame Ground IP address or SMD value and class table 51, identify the class of frame.But in transmission device 11a, as the storage information of frame, As long as destination MAC Address, send side mac address, the priority of VLAN, the priority of Ethernet (registered trademark) frame, with Too the type of net (registered trademark), a part of the head information of IP grouping, logic port number etc. or combination are plurality of and obtain The storage information of the frames such as the information arrived, is not particularly limited.The transmission device 11a constituted in this way can also obtain above-mentioned reality Apply the effect of mode 1.
In the transmission device 11a of above-mentioned present embodiment 1, if terminal installation 21,22 and transmission device 11a~12a tool There is the MAC for applying IET technology, with low latency transmits the frame of low latency class.In addition, storage of the class identification part 312a according to frame Information, that is, frame destination IP address or SMD value and class table 51, identify the class of frame.But transmission device 11a can also basis The IET of pre-stored the port is corresponding with the combination of no information and SMD value and class table 51 to identify the class of frame.In this case, If only a part of terminal installation and transmission device has the MAC for applying IET technology.Transmission device 11a is connect with port Device in the case where be the device of not applicable IET technology but set SMD value in frame, be set as frame mistake and abandon, because This, can also be confirmed whether be to be applicable in the device of IET technology after, class is identified according to SMD value and class table 51.In addition, identification frame The combination of information of class be arbitrary.The transmission device 11a constituted in this way can also obtain the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, the information of the class of frame is stored in " data " of frame by dispenser Project in sent, thus to class extraction unit 412 send frame category information, but it is also possible to by uniquely binding frame and The identiflication number of category information is managed.Specifically, transmission device 11a assigns identiflication number to each frame.Transmission device 11a tool There is the table of the identiflication number of frame and the category information of frame.Transmission device 11a can also after class extraction unit 412 receives frame, according to The table of the category information of the identiflication number of the frame received and the identiflication number of frame and frame extracts category information.In addition, transmission device 11a also can replace the table of the category information of identiflication number and frame with frame and the category information of frame be sequentially stored in queue, Thus class extraction unit 412 is sent by category information.In addition, being an example in assignment portion to the portion that each frame assigns identiflication number.Storage The queue of the category information of the table or frame of the category information of the identiflication number and frame of frame is an example in binding portion.The transmission constituted in this way Device 11a can also obtain the effect of above embodiment 1.
In the transmission device 11a of above-mentioned present embodiment 1, according to the SMD value of the frame received by combination processing portion 61 And the storage forwarding access of low latency class and the storage forwarding access of general class are distributed to, but it is also possible to according to class is based on The result of table and the class identified distribute to the storage forwarding access of low latency class and the storage forwarding access of general class.In this way The transmission device 11a of composition can also obtain the effect of above embodiment 1.
Embodiment 2
In the embodiment 1, category information is stored according to the storage information of receiving unit 31a~34a frame received and is connect It is sent in the frame received, transmission unit 41a~42a identifies the category information of frame as a result, still, in embodiment 2, with frame Concurrently send the category information of received frame.Therefore, effect same as embodiment 1 can be obtained.In addition to this with Embodiment 1 is identical.In the following description, it to the structure having been described above and the identical label of movement mark and omits repetition and says It is bright.
Describe the movement of the receiving unit 31a of transmission device 11a.
Dispenser 314a is entered the category information of frame from class identification part 312a, still, when transmitting frame, does not assign needle to frame Category information and output port information to object frame.Dispenser 314a sends received frame and indicates from class identification part 312a The pulse signal of the category information received.Pulse signal is an example of parallel information.In addition, indicate category information pulse signal from After dispenser 314a is sent, it is sent to via combination processing portion, switch process portion, straight-through storage unit, storage forwarding storage unit Send portion.The movement of the dispenser 314a, the dispenser 314b of receiving unit 33a, 34a of receiving unit 32a and the dispenser of receiving unit 31a 314a is identical.
Figure 18 is the functional block diagram of the transmission unit 41a of the transmission device 11a of embodiments of the present invention 2.
For IET output control unit 411a not instead of from the category information of 412 receiving frame of class extraction unit, receiving indicates category information Pulse signal.
Figure 19 is the figure for showing dispenser 314a and sending an example of the category information of frame as pulse signal when.
Figure 19 is the figure for showing the relationship of category information of transmitted frame and the frame parallel with frame.Figure 28 (a) is to show institute The figure of the relationship of the frame and time of transmission.Figure 19 (b) is the figure of the signal value for showing the category information of frame and the relationship of time.
Assuming that receiving unit 31a receive the frame 1 of low latency class, the frame 2 of general class, low latency class frame 3.It is identified from class After portion 312a is entered the category information of frame, dispenser 314a sends each frame as Figure 19 (a), and send Figure 19 (b) that The pulse signal of sample.Here, it indicates to be low latency class in the case where pulse signal is " 1 ", the case where pulse signal is " 0 " Lower expression is general class.For example, dispenser 314a sends the frame 1 of low latency class, and sends pulse signal in moment t1~t2 "1".In the frame 2 of general class, the frame 2 of general class is sent in moment t3~t4, dispenser 314a, and send pulse signal “0”。
In addition, being set as indicating to be low latency class in the case where pulse signal is " 1 ", indicate to be one in the case where " 0 " As class, still, value is arbitrary.In addition it is also possible to use other signals without using pulse signal.
As described above, dispenser 314a generates the frame for indicating inputted in the transmission device 11a of present embodiment 2 The parallel information of category information concurrently sends parallel information with frame, and IET output control unit 411a obtains class letter from parallel information Breath, therefore, obtains effect same as embodiment 1 without storing category information in frame.
Embodiment 3
In the embodiment 1, unrelated with the frame of the frame or storage forwarding transmission that are straight-through transmission, IET output control unit 411a assigns SMD-E to the SMD value of the frame of low latency class, still, shows the SMD value tax to the frame of the low latency class of straight-through transmission The embodiment given SMD-E, assign SMD-S to the SMD value of the frame of the low latency class of storage forwarding transmission.In the following description In, to the structure having been described above label identical with movement mark and omit repeated explanation.
Figure 20 is the functional block diagram of the transmission device 11a of embodiments of the present invention 3.With the difference of embodiment 1 It is, receiving unit 31a~32a is referring to class table 51.
Figure 21 is the functional block diagram of the receiving unit 31a of the transmission device 11a of embodiments of the present invention 3.With embodiment 1 The difference is that class identification part 312a is referring to class table 51.
Then, the movement of the transmission device 11a of embodiments of the present invention 3 is illustrated.
Figure 22 is the flow chart for showing the movement of transmission device 11a of embodiments of the present invention 3.
Step S501~S502 is identical as the step of embodiment 1 S101~step S102.
In step S503, combination processing portion 61 passes through storage forwarding access receiving frame from receiving unit 31a.If received Frame be low latency class frame (step S503: yes), then combination processing portion 61 directly forwards access by the storage of low latency class It is transmitted.If step 503 is "No", the frame that receives is not the frame of low latency class, S504 is entered step.
Step S504~S507 is identical as the step of embodiment 1 S104~step S107.Step S508 is described below.
Figure 23 is the flow chart for showing the movement of the transmission unit 41a of transmission device 11a of embodiments of the present invention 3.Make The movement of the step S508 of Figure 22 is illustrated with Figure 23.
Step S601~S609 is identical as the step of Figure 17 of embodiment 1 S401~step S409.
In step S610, it is judged as the biography at first stored in storage forwarding storage unit 81a in IET output control unit 411a In the case that the frame sent is low latency class, step S610 becomes "Yes", enters step S611.In step s 611, IET output control Portion 411a processed sends license to storage forwarding storage unit 81a, forwards storage unit 81a receiving frame from storage.IET output control Portion 411a assigns SMD-S to the SMD value of the head of the frame received, and the pre-determined byte number of the frame received is transmitted to end End device 21.Pre-determined byte numerical example 1byte, 2byte in this way etc., are whether acknowledgement frame comes straight-through storage unit 91a Period.Start the transmission of progress frame.After step S611, return step S601.
In step S610, it is judged as the biography at first stored in storage forwarding storage unit 81a in IET output control unit 411a In the case that the frame sent is not low latency class, step S610 becomes "No", return step S601.
But the only an example of transmission device and transfer approach shown in above embodiment, it being capable of appropriately combined structure At being not limited to the individual structure of embodiment.Received frame can also be concurrently sent with frame as Embodiment 2 Category information.
As described above, in the transmission device 11a of present embodiment 1, output control unit 411a in output low latency class and In the case where determining the frame transmitted with store-and-forward mode, it is the SMD-S of general class as expression by the SMD value for setting frame and sets table Show that the class of the priority different from SMD value is stored in frame for the information of low latency class to be exported, therefore, transmission device 12a With class table identical with the class table of transmission device 11a, if not according to SMD value according to the information stored in " data " of frame It identifies class, even then setting the frame of " SMD-S " in " SMD value ", is also identified as after being transmitted to transmission device 12a The frame of low latency class can be transmitted with direct-passing mode.
Label declaration
1: conveyer system；11a, 12a: transmission device；21~26: terminal installation；101~104: port；31a~34a: it connects Receipts portion；41a~44a: transmission unit；51: class table；52: address solves table；61~64: combination processing portion；71: switch process portion； 81a~84a: storage forwarding storage unit；91a~92a: straight-through storage unit；111: bus；112: input and output IF；113: storage Device；114: storage medium；115:CPU；116: processing circuit；311: input port identification part；312a~312b: class identification part； 313: output port determination section；314a~314b: dispenser；411a:IET output control unit；411b: output control unit；412: Class extraction unit.

Claims (18)

1. a kind of transmission device, includes
Output port determination section determines output institute according to the storage information stored in the frame inputted from multiple ports State the output port of frame；
Dispenser, the output port and the input port for being entered the frame that export the frame transmitted with direct-passing mode is one-to-one Ground is mapped, according to the classification information for the input port for being entered frame, the category information of the frame and by the output port Determination section determine output port, the 1st frame is distributed to the 1st path being transmitted with direct-passing mode, by the 2nd frame distribute to The 2nd path that store-and-forward mode is transmitted；And
IET output control unit is assigned to the 1st frame in the 1st path from output port output, according to being divided The category information of 2nd frame in the 2nd path described in dispensing decides whether to divide the 2nd frame, according to determining from described defeated Exit port exports the 2nd frame.
2. transmission device according to claim 1, wherein
The low latency class and the general class other than the low latency class that the category information is the transmission for requiring low latency,
The dispenser is to export the frame transmitted with direct-passing mode in the output port determined by the output port determination section The classification information of output port and the input port indicate with the output port one to one corresponding input port and In the case that the category information of the frame inputted is the low latency class, the frame is distributed into the 1st path.
3. transmission device according to claim 1 or 2, wherein
The IET output control unit is in the case where the category information of the 2nd frame is low latency class, not to the 2nd frame Export the 2nd frame with being split.
4. transmission device according to any one of claims 1 to 3, wherein
The transmission device includes
The category information of the storage information and frame is mapped by class table；And
Class identification part, the category information of the frame is identified according to the storage information and the class table, and output is identified The category information.
5. transmission device described in any one according to claim 1~4, wherein
The transmission device has class identification part, such identification part identifies described according to the storage information and the SMD value of frame The category information of frame, and export the category information identified.
6. according to transmission device described in any one in claim 4~5, wherein
The category information inputted from the class identification part is stored in the frame by the dispenser,
The transmission device has class extraction unit, such extraction unit is believed from the class stored in the frame is extracted in the frame Breath, and the category information of the frame extracted to IET output control unit transmission.
7. transmission device according to any one of claims 1 to 5, wherein
The dispenser generates the parallel information of the category information for the frame for indicating inputted, concurrently sent with the frame described in Parallel information,
The IET output control unit obtains the category information from the parallel information.
8. transmission device according to any one of claims 1 to 5, wherein
The transmission device includes
Assignment portion assigns identiflication number to the frame；
Binding portion uniquely bundlees the identiflication number and the category information；And
Class extraction unit, according to the identiflication number, by the identiflication number of the frame of binding portion binding and described The category information of frame extracts the category information of the frame, and extracted institute is sent to the IET output control unit State category information.
9. according to transmission device described in any one in claim 2~8, wherein
The dispenser is corresponding with no information according to the IET of the input port and the output port, by the frame of low latency class Distribute to the 1st path or the 2nd path.
10. transmission device according to claim 9, wherein
The dispenser is under the input port and output port both sides situation corresponding with IET, by low latency class Frame distributes to the 1st path, and the either side in at least described input port or the output port is not corresponding with IET In the case of, the frame of the low latency class is distributed into the 2nd path.
11. transmission device according to any one of claims 1 to 10, wherein
The classification information of the input port is input port number.
12. transmission device according to any one of claims 1 to 10, wherein
The classification information of the input port is that IET is corresponding with no information.
13. transmission device according to any one of claims 1 to 10, wherein
The classification information of the input port is connection facility information.
14. according to transmission device described in any one in claim 2~13, wherein
The IET output control unit is in the case where exporting low latency class and with the frame of store-and-forward mode transmission, output The SMD value of the frame as indicate be low latency class SMD-E.
15. according to transmission device described in any one in claim 2~13, wherein
The IET output control unit is in the case where exporting low latency class and with the frame of store-and-forward mode transmission, output The SMD value of the frame as indicate be general class SMD-S.
16. a kind of transfer approach, has follow steps:
According to the storage information stored in the frame inputted, the output port for exporting the frame is determined from multiple ports；
The output port of frame that output transmit with direct-passing mode with the input port for being entered the frame corresponding one to one Come, according to the classification information for the input port for being entered frame, the category information of the frame and the output port that is determined, by the 1st Frame distributes to the 1st path being transmitted with direct-passing mode, and the 2nd frame is distributed to the 2nd be transmitted with store-and-forward mode Path；And
It is assigned to the 1st frame in the 1st path from output port output, according to being assigned to the 2nd path The category information of the 2nd frame decide whether to divide the 2nd frame, according to determining from output port output described the 2 frames.
17. a kind of conveyer system, which has multiple transmission devices, wherein
The transmission device includes
Output port determination section determines output institute according to the storage information stored in the frame inputted from multiple ports State the output port of frame；
Dispenser, the output port and the input port for being entered the frame that export the frame transmitted with direct-passing mode is one-to-one Ground is mapped, according to the classification information for the input port for being entered frame, the category information of the frame and by the output port Determination section determine output port, the 1st frame is distributed to the 1st path being transmitted with direct-passing mode, by the 2nd frame distribute to The 2nd path that store-and-forward mode is transmitted；And
IET output control unit is assigned to the 1st frame in the 1st path from output port output, is turned with storage Originating party formula transmits the 2nd frame for being assigned to the 2nd path, and is according to the decision of the category information of the 2nd frame No segmentation the 2nd frame exports the 2nd frame from the output port according to decision.
18. conveyer system according to claim 17, wherein
The low latency class and the general class other than the low latency class that the category information is the transmission for requiring low latency, it is the multiple Transmission device has class identification part, such identification part is according to being identified based on the common reference of the storage information stored in frame Low latency class and the general class.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022226762A1 (en) * 2021-04-27 2022-11-03 华为技术有限公司 Data forwarding and scheduling methods and apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114374475A (en) 2018-03-31 2022-04-19 华为技术有限公司 Method for transmitting data and forwarding equipment
EP4106283A1 (en) * 2021-06-16 2022-12-21 ADVA Optical Networking SE Time-sensitive transmission of ethernet traffic between endpoint network nodes

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050018638A1 (en) * 2001-12-07 2005-01-27 Telefonaktiebolaget Lm Ericsson (Publ) Wireless station and a transmission method in a wireless local area network
CN105099954A (en) * 2014-12-05 2015-11-25 国家电网公司 Transformer substation process layer message networking-sharing port-sharing transmission system
CN105191235A (en) * 2013-03-20 2015-12-23 马维尔国际贸易有限公司 Cut-through processing for slow and fast ports
JP2016103700A (en) * 2014-11-27 2016-06-02 三菱電機株式会社 Switch device
US20160173395A1 (en) * 2014-12-12 2016-06-16 Net Insight Intellectual Property Ab Timing transport method in a communication network
WO2016132402A1 (en) * 2015-02-20 2016-08-25 三菱電機株式会社 Communication frame transfer device and communication system
CN106233670A (en) * 2014-04-23 2016-12-14 三菱电机株式会社 Relay and data transferring method
CN106464606A (en) * 2014-06-11 2017-02-22 马维尔国际贸易有限公司 Systems and methods for blocking transmission of a frame in a network device

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5838684A (en) * 1996-02-22 1998-11-17 Fujitsu, Ltd. Low latency, high clock frequency plesioasynchronous packet-based crossbar switching chip system and method
US6185203B1 (en) * 1997-02-18 2001-02-06 Vixel Corporation Fibre channel switching fabric
US6144668A (en) * 1997-11-26 2000-11-07 International Business Machines Corporation Simultaneous cut through and store-and-forward frame support in a network device
JP4105341B2 (en) 1999-08-13 2008-06-25 富士通株式会社 Fragment size changing method and router apparatus
KR20010027148A (en) * 1999-09-10 2001-04-06 서평원 apparatus and method for packet processing in Ethernet switching system
JP3584859B2 (en) 2000-06-29 2004-11-04 日本電気株式会社 Packet scheduling device
US20020118692A1 (en) * 2001-01-04 2002-08-29 Oberman Stuart F. Ensuring proper packet ordering in a cut-through and early-forwarding network switch
JP2003338844A (en) 2002-05-21 2003-11-28 Mitsubishi Electric Corp Packet transfer method and repeating apparatus
US20080273546A1 (en) * 2007-05-03 2008-11-06 Xyratex Technology Limited Data switch and a method of switching
JP5302559B2 (en) * 2008-03-26 2013-10-02 トヨタ自動車株式会社 Transfer switching network device and frame transfer method
US9013997B2 (en) 2012-06-01 2015-04-21 Broadcom Corporation System for performing distributed data cut-through
JP6352255B2 (en) * 2012-07-05 2018-07-04 エルジー エレクトロニクス インコーポレイティド Terminal detection signal transmission method and apparatus for direct communication between terminals in a wireless communication system
DE112012007061B4 (en) * 2012-11-22 2016-09-08 Mitsubishi Electric Corp. Data collection and transmission device
US9544247B2 (en) * 2013-03-15 2017-01-10 Innovasic, Inc. Packet data traffic management apparatus
US9419912B2 (en) * 2014-02-11 2016-08-16 International Business Machines Corporation Selective underflow protection in a network switch
US9699118B2 (en) * 2014-04-25 2017-07-04 Avago Technologies General Ip (Singapore) Pte. Ltd. System for flexible dynamic reassignment of throughput
US9397941B2 (en) * 2014-06-27 2016-07-19 International Business Machines Corporation Dual purpose on-chip buffer memory for low latency switching
US9894013B2 (en) * 2015-02-03 2018-02-13 Avago Technologies General Ip (Singapore) Pte. Ltd. Early queueing network device
US11044183B2 (en) * 2015-12-29 2021-06-22 Xilinx, Inc. Network interface device
CN109891833B (en) * 2016-10-26 2021-06-08 三菱电机株式会社 Transmission apparatus and frame transmission method
KR101860234B1 (en) * 2016-12-20 2018-05-21 엘에스산전 주식회사 Method for setting link speed of dual port switch
CN108462646B (en) * 2017-02-17 2020-08-25 华为技术有限公司 Message processing method and device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050018638A1 (en) * 2001-12-07 2005-01-27 Telefonaktiebolaget Lm Ericsson (Publ) Wireless station and a transmission method in a wireless local area network
CN105191235A (en) * 2013-03-20 2015-12-23 马维尔国际贸易有限公司 Cut-through processing for slow and fast ports
CN106233670A (en) * 2014-04-23 2016-12-14 三菱电机株式会社 Relay and data transferring method
CN106464606A (en) * 2014-06-11 2017-02-22 马维尔国际贸易有限公司 Systems and methods for blocking transmission of a frame in a network device
JP2016103700A (en) * 2014-11-27 2016-06-02 三菱電機株式会社 Switch device
CN105099954A (en) * 2014-12-05 2015-11-25 国家电网公司 Transformer substation process layer message networking-sharing port-sharing transmission system
US20160173395A1 (en) * 2014-12-12 2016-06-16 Net Insight Intellectual Property Ab Timing transport method in a communication network
WO2016132402A1 (en) * 2015-02-20 2016-08-25 三菱電機株式会社 Communication frame transfer device and communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022226762A1 (en) * 2021-04-27 2022-11-03 华为技术有限公司 Data forwarding and scheduling methods and apparatus

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